Electric heating attachment for hot-water bags.



PATENTED JAN. 1, 1907.

0. VAND. HILL. ELECTRIC HEATING ATTACHMENT FOR HOT WATER BAGS.

APPLICATION FILED FEB. 28, 1906.

CHARLES VAN DYKE HILL, OF ST. LOUIS, MISSOURI.

ELECTRIC HEATING ATTACHMENT FOR HOT-WATER BAGS- Specification of LettersPatent.

Patented Jan. 1, 1907.

v Application filed ram 23,1906. Serial 1%. 302,536.

To all whom, it may concern.-

Be it known that I, CHARLES VAN DYKE HILL, a citizen of the UnitedStates, residing at the city of St. Louis, State of Missouri, haveinvented a certain new and useful Improvement in Electric HeatingAttachments or Hot-Water'Bags, of which the following is a full, clear,and exact description,-such as will enable others skilled in the art towhich 1t appertains to make and use the same, reference being had to theaccompanying drawnlgis, forming part of this specification, in w cFigure l is a sectional view through a hotwater bag, showing my im rovedelectric.

heating attachment applie thereto; and Figs. 2, 3, 4, and 5 aresectional views through modified forms of heating attachments.

This invention relates to a new and useful improvement in electricheating attachments for hot-water bags, the object being to simpli andreduce the cost of manufacture of suc devices.

In the drawings, 1 indicates a hot-water.

bag, into the neck portion of which is arranged a threaded thimble 2 forreceiving the screw-stopper which is now generally employed.

My Improved electric heating attachment consists of a tube 3, secured tothe screwstopper 4 1n the bag, which'sto per is usually composed of ametallic she having an outwardly-proj ecting-flange at its upper edgeand an inwardly pro ectmg flange at its lower edge. The tube 3 issoldered or otherwise secured to the lower flange and in the position. Acap secured to the outwardly-extending flange of 1 form shown'in Fig. 1projects into the stopper some httle distance. 5 1s a spacinginsulation-button arranged 1n the lower end of the tube, in which ismounted the resistance 6 in the form of' graphite, one end ofwhich isconnected to a wire 7 and to the other end of which is connected a wire8. An insulation-sleeve 9 surrounds the upper end of the resistance barto hold the same in pro er position in the tube. Insulation material lb,preferably in a granulated form, is arran ed in the hollow stopper, soas to prevent t e wires 7 and 8 from short-circuiting, said insulationmaterial also serving to -hol the resistance-bar 6 in 11 is soldered orotherwise .the stopper, and through openings in this cap the wires 7 and8, whichare insulated at this point, pass. A handle 12 is secured to thecap, which handle is in the form of bent wire,-as shown, the wires 7 and8 being bound together above and below the top connectingpiece of thehandle, so as to be free to move within the limits of the handle. Wires7 and 8 lead to a plug 13, which may be inserted in an ordinarylamp-socket.

In operation the water is preferably first heated and placed in the bag,after which the electric heating attachment and stopper are arran ed inposition and the current turned on. have found by experiment that toemfploy a resistance which will generate su cient heat to raise thetemperature of cold water to the required degree within a rea sonabletime-sayhve or ten minuteswill require some means for increasing theresistance so as to maintain the proper temperature in the water, elsethe water will become too hot and the bag will swell on the generationof gases therem. I therefore prefer to so proportion the resistancerelative to the current used as to maintain water which is first heatedand placed in the bag at the desired temperature. In this manner I avoidall possibllity of overheating the water and also obviate the swellingof the bag when the water is overheated. Of course it will be understoodthat the heat generated by the electrical apparatus would eventuallyraise the temperature of cold water to the reuired degree; but as suchwould require considerable time it is not recommended in practice.

In Fi 2 I have shown a modified form of electric eating a fparatus inwhich there is a cap-washer 6, o insulation material, arranged in thebottom of the stopper-shell for cap washer is held in position by athimble 6 of insulation material, which thimble acts as a spacer andbears its upper end against an insulation cap-piece 6 he (1 in positionby the flange of the stopper-shell which isspun thereover or by the useof suitable rivets, as shown. In this form. of my apparatus the wires 7and 8 lead to terminal posts 7 and 8 which serve as handles for screwingthe stopper into and out of position before the electrical connection ismade.' 14 is an insulaholding the resistance-bar 6 in place. Thistion-plughaving terminal sockets for cooperatingwith the posts 7 and 8which terminal sockets are connected by wires to the plug 13, suchasshown in Fig. 1. By this construction it is obvious that the wires maybe disconnected from the bag by moving the plugs over the posts.

, Fig. 3 I have shown another modified form in which instead of using aninsulation cap-piece for the stopper-shell I employ a metal cappiece 11and in order to support the posts Z? and 8?- in position I arrange insulation-pieces l1? and 11 aboveand below the capiece. Theresistance-bar 6 in this form is held in position by an insulation piece6 V in Fig. 4 I have shown another form in which a coil-wire is usedinstead of the resis'tance-bar. This wire is, coiled on an in-- rial ofwhich this spool is made is preferably of what is known as lavite onaccount of its cheapness and ease of manipulation. An insulation-plug16, of similar material, is arranged within the shell of the stopper,whose upper fianjg may be spun thereover to hold said insulation-plug inposition.

Havinglthus described the invention, what is claimedas new, and desiredto be secured by Letters Patent, V

p 1. In an electric heating attachment for hot-water bags, thecombination with a stoppereshell, of a tube secured in position in saidshell, said-tube being closed at its lower end andopen at its upper end,a resistance-bar in said tube, means ior holding said resistancehas inp'osition in the tube, and wires connected to the opposite ends of saidresistancebar; substantially as described.

2. In an electric heating attachment for hotj water bags, thecombination with a hollow stopper, of a tube secured in positiontherein, said tube being closed at its lower end and. open at its upperend, a resistancebar arrangedin said tube, means for insulatings'aid barfrom said tube and supporting the bar in position in the tube, electricconductors connected to the opposite ends of the tube, anda cap piececlosing the hollow stopperandthrongh openings in which said electricconductors. pass substantially as decribed- 3 electricheating'attachment for hot-water bags, the combination with a hollowstopper, of a tube-secured'in position therein, saidtube being closed atits lower end and open at it s up fer end, a resistancebar arranged insaid til e, means for insulating saidbar fiom said tube and supportingthe bar in position in the tube, electric conductors connected to theopposite ends of the tube, a cap-piece closing the hollow stopper andthrough openings in which said electric conductors pass, and a handle onsaid tube in the form of a loop to the outer connectingpiece of whichthe said electric conductors are bound so as to have limited movementand relieve the points of connection of said conductors from strain;substantially as de scribed.

4. In an electric heating attachment for hot-water bags, the combinationwith a hollow stopper-shell and its tube, of electrical resistancearranged in said tube, granulated insulation material in said hollowstop er for holding said resistance in position, e ec'tric conductorsleading to and from said resistance through said granulated insulationmaterial, and a cap-piece closing said hollow stopper, said cap-piecebeing provided with o enings forthe passage of said electriccondilctors; substantially as described.

'5. In an electric heating attachment for hot-Water bags, thecombination with a hollow stopper-shell and its tube, a resistancebararranged in said tube, an insulatlonwasher engaging the upper end of theresistance-bar for holding the same in position, a capiece for closingthe stopper-shell, and ins ation material interposed between the Washerand said cap-piece; substantially as described.

. 6. In an electric heating attachment for hot-water bags, thecombination with a hollow stopper-shell and its tube, a resistance' bararranged in said tube, an insulatron washer engaging the upper endoi theresistance-bar for holding the same in position, a capiece for closingthe stopper-shell, and insuiation material interposed between the washerand said cap-piece, said insulation material beingin granulated form;substantially as described.

7. In an electric heating attachment for hot-water bags, the combinationwith a hol low stopper-shell and its tube, a resistance bar arranged in'said tube, an insulation- Washer engaging the upper end of theresistance-bar for holding the same in position, a capiece for closingthe stopper-shell, and ins ation material in the form of a-hollow sleeveengaging-the washer and cap-piece; substantially as described.

'8. In an electric heating attactrinent for hot-water bags, thecombination with a stopper-shell and its tube, of a resistance-bararranged in the tube, a cap-piece for the shellstopper, and a postbearing against said resistance-bar and cap-piece for holding thevformer, inposition substantially as described. 9. In an electric heatingattachment for hot-water ba s, the combination with a stopv per-shelland ts tube, of a spool shaped insulation-piece arranged in the tube andpro- In testimony whereof Ihereunto aflix my vided with alongitudinally-disposed groove, signature, in the presence of twowitnesses, IO

' a resistance-wire coiled on said spool and this 19th day of February,1906.

having the return ortion of thewire located Y in said groove, an d aninsulation-piece ar- CHARLES VAN DYKE L ranged in the shell-stopper andbearing Witnesses:

against the head of said spool for holding the LENORE WILsoN,

same in position; substantially as described. GEORGE BAKEWELL;

